Department of Mathematics, Islamic University of Gaza, Gaza, Palestine; Department of Statistics, University of Tabuk, Tabuk, Tabuk, Saudi Arabia
Riffi, Mohamed I., Department of Mathematics, Islamic University of Gaza, Gaza, Palestine; Ansari, Saiful Islam, Department of Statistics, University of Tabuk, Tabuk, Tabuk, Saudi Arabia; Hamdan, Mohammed S., Department of Mathematics, Islamic University of Gaza, Gaza, Palestine
S.I. Ansari; Department of Statistics, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia; email: saiful.islam.ansari@gmail.com